Voorpret 8pcs Lighted Nocks, Led Automatic Light for Arrows with .244/6.2mm Inside Diameter (6pcs Blue+ 2pcs 7colors)$21.99
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?Lighted Nocks for 6.2mm Arrows?: Led Nocks for 6.2mm Shaft Fits All Carbon Express Arrow Shafts with a 0.244″ Inside Diameter.
?On/Off Switch?: The Nocks will Automatically Light On when engaged with String. Pull the button Up if You Want to Turn it off. Waterproof and Shock Resistant Design.